What does "bullbat" mean?

A New World bird, common nighthawk (Chordeiles minor).

What is a synonym for "bullbat"?

Common synonyms include: assertive, blunt, brusque, fabled bat, forceful, forthright.

noun

noun ·Rare ·Advanced level

Noun

1
A New World bird, common nighthawk (Chordeiles minor).
"bullbats peened overhead and dived on roaring wings."
2
mainly nocturnal North American goatsucker wordnet

"bullbats peened overhead and dived on roaring wings."

bull + bat; so called from the loud noise it makes while feeding on the wing, in the evening.